[kimi85]

glycine + 1. benzoyl chloride, 2. acetic anhydride -->
a. glycyl anhydride   
b. hippuric acid
c. N-benzoylglycine acetate
d. phenylalanine

D-ribose + excess phenylhydrazine -->
a.D-ribose phenylhydrazone
b. D-erythrose
c. D- erythrose osazone
d. B-D-ribose
e. D-arabinose osazone

alanine + dicyclohexylcarbodiimide -->
a. alanylalanine + dicyclohexylurea
b. cyclohexyl alaninate
c. N-cyclohexylalanine
d. dicyclohexyl carbonate  + alanylalanine

alanine + 1 equivalent benzyl chloroformate -->
a. N-carbobenzyloxyalanine
b. alanyl carbobenzyloxyl anhydride
c. benzyl alaninate
d. benzyl chloride
e. N-benzylalanine

I really don't know what type of reactions they undergo, so I don't know how to answer these.

Thanks! Please also tell me the type of reaction.